L. Brown, Lagopus
Thanks again for your replies.
I have to state the following although I am well aware that it validates nothing!
This gun was the first gun that my father handed over to me. However in the many years he used it before he gave it to me he fired literally tens of thousands (yes, tens of thousands) of American 3" 1 7/8 oz. magnum rounds through it in the blythe belief that 3" is 3"! In the twenty five years it has been with me I too have fired at least ten thousand magnum rounds through it without deleterious effect ( apparently) until I came upon this web site and read a few books and mayhap have learnt better! Perhaps this is a proof of sorts, but not to be relied upon!
I own a AyA 3" gun made as the "Super Solway" for Elderkin and Sons , a British Gunmaker, which I bought for 300 as a penurious student in 1983. It has 1200 kp/cm squared ( Kilo pascals per centimetre squared) which I was assured could handle any known 12bore cartridge (before the 3 1/2 inchers I believe) and has! However this gun has only about 2/3ds the thickness of steel around the chambers as my Jeffery. Possibly reflecting better later steel. Is this equivalent to Superior Proof?
Tomorrow is a public holiday here and I must spend time with my family! However the DEMON shall return
All the best
Skeeterbd
